4-Chromanone
| Price | USD1.00 |
| Packge | 1kg |
- Min. Order:1kg
- Supply Ability:100KG
- Time:2019-07-06
Product Details
- Product Name4-Chromanone
- CAS No.491-37-2
- EINECS No.207-736-3
- MFC9H8O2
- MW148.16
- InChIKeyMSTDXOZUKAQDRL-UHFFFAOYSA-N
- AppearanceCrystalline Powder, Crystals or Low Melting MassWhite to yellow
- Melting point 35-38 °C(lit.)
- Boiling point 127-128 °C13 mm Hg(lit.)
- Water Solubility Slightly soluble in water.
- storage temp. Keep in dark place,Sealed in dry,Room Temperature
- density 1.1291
| 4-Chromanone Basic information |
| Product Name: | 4-Chromanone |
| Synonyms: | ,3-Dihydro-2-benzopyran-4-one;,3-Dihydro-4-benzopyranone;2,3-dihydro-4-benzopyranone;2,3-dihydro-4h-1-benzopyran-4-on;2,3-Dihydro-4H-1-benzopyran-4-one;4-chormanone;Isochromanone;CHROMANONE |
| CAS: | 491-37-2 |
| MF: | C9H8O2 |
| MW: | 148.16 |
| EINECS: | 207-736-3 |
| Product Categories: | Fused Ring Systems |
| Mol File: | 491-37-2.mol |
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| 4-Chromanone Chemical Properties |
| Melting point | 35-38 °C(lit.) |
| Boiling point | 127-128 °C13 mm Hg(lit.) |
| density | 1.1291 |
| refractive index | n20/D 1.575(lit.) |
| Fp | >230 °F |
| storage temp. | 0-10°C |
| form | Crystalline Powder, Crystals or Low Melting Mass |
| color | White to yellow |
| Water Solubility | Slightly soluble in water. |
| BRN | 124652 |
| CAS DataBase Reference | 491-37-2(CAS DataBase Reference) |
| NIST Chemistry Reference | 4H-1-Benzopyran-4-one, 2,3-dihydro-(491-37-2) |
| EPA Substance Registry System | 4H-1-Benzopyran- 4-one, 2,3-dihydro-(491-37-2) |
| Safety Information |
| Hazard Codes | Xi |
| Risk Statements | 33-36/37/38 |
| Safety Statements | 24/25-36-26 |
| WGK Germany | 2 |
| RTECS | DJ2981225 |
| TSCA | Yes |
| HazardClass | IRRITANT |
| HS Code | 29329990 |
| MSDS Information |
| Provider | Language |
|---|---|
| 4-Chromanone | English |
| ACROS | English |
| SigmaAldrich | English |
| ALFA | English |
| 4-Chromanone Usage And Synthesis |
| Chemical Properties | white to light yellow crystal powder |
| Purification Methods | It has been recrystallised from pet ether, or purified by dissolving in *C6H6 washing with H2O, drying (MgSO4), evaporating and distilling in a vacuum, then recrystallising the residue. The liquid has a pleasant lemon-like odour. The semicarbazone has m 227o. [Loudon & Razdan J Chem Soc 4299 1954.] The oxime is prepared from 3g of chromanone, 3g NH2OH.HCl in EtOH (50mL), 6g K2CO3 and refluxed on a water bath for 6hours. The solution is poured into H2O, the solid is filtered off, dried and dissolved in hot *C6H6 which on addition of pet ether yields the oxime as glistening needles m 140o. Hydrolysis of this gives very pure chromanone. The benzal derivative is prepared from 3g of chromanone and 4g PhCHO in 50mL EtOH, heated to boiling, 10mL of conc HCl are added dropwise and set aside for several days. The derivative separates and is recrystallised from EtOH to give yellow needles, m 112o [Powell J Am Chem Soc 45 2711 1923]. Reaction with Pb(OAc)4 yields the 3-acetoxy derivative m 74o (from pet ether + trace of EtOAc) [Cavill et al. J Chem Soc 4573 1954, Beilstein 17/10V 14]. |
Company Profile Introduction
Henan CoreyChem Co., Ltd, based on the original Zhengzhou Cote Chemical Research Institute, be brave in absorbing highly educated talents & overseas returnees; actively responded to Zhengzhou City High-tech Zone Government’s Special Care Policy, reorganized and founded in National University of Science and Technology Park, which is a high-tech, stock enterprise of high-end chemical Custom synthesis;The park was created by the People's Government of Henan Province, and proved by Ministry of Education and the National Science & Technology, taking the construction mode of "many college a park, and common development", mainly depends on Zhengzhou University and Henan University’s scientific research and talent advantage to set up Universities, scientific research institute and enterprise scientific research achievements transformation platform, to make high-tech enterprises incubate, is the new high-tech talent gathering base, high and new technology industry enterprise radiation base, colleges and universities technological innovation base.
Henan Coreychem Co., Ltd, facing global High-tech pharmaceutical raw materials, high complex new type intermediates, fine chemicals custom synthesis, scale-up production and Rare chemicals trade. Corey have well-equipped machine, strong technical force and considerate marketing team service. We also have rich experience advantage in basic research, small scale process development, scale-up, industrial technology development & production and cost control.
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- Since:2014-12-17
- Address: No.967,15th Floor,Unit 7, Building 1, No.70 of DianChang Road, High-tech Development Zone, Zhengzho
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